Solvent Extraction of Rhenium(VII) from Aqueous Solution Assisted by Hydrophobic Ionic Liquid

Fang, Dawei; Song, Zongren; Zhang, Si-Cai; Li, Jun; Zang, Shuliang

doi:10.1021/acs.jced.6b00909

Cited by 15 publications

(14 citation statements)

References 18 publications

(21 reference statements)

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“… 6 However, reserves of Re in the nature were seriously insufficient, and the quality of minerals was low, added to the extreme imbalance of minerals in distribution, the shortage of Re existed extensively naturally, which had impeded the development of superalloy industries and downstream industries seriously. 7 On the other hand, the metallurgical process of Re was not reasonable enough because the separation and purification was much inefficient. The separation and purification process was undertaken by the ion exchange method mainly for the moment, but the selectivity of this method was very poor.…”

Section: Introductionmentioning

confidence: 99%

Study on Synthesis and Adsorption Properties of ReO₄^– Ion-Imprinted Polymer

Liu

Jia

et al. 2020

ACS Omega

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In this work, an ion imprinted polymer (ReO 4 – -IIP) of the perrhenate ion based on acrylamide (AM) and acrylic acid (AA) was prepared by solution polymerization using ReO 4 – as a template ion, N , N -methylenebisacrylamide (NMBA) as cross-linkers, hydrogen peroxide-vitamin C (H 2 O 2 -Vc) as an initiator, and a mixed solution of water (H 2 O) and methanol (CH 3 OH) with volume ratio v(H 2 O)/v(CH 3 OH) = 3:7 as a solvent. During the process of synthesis condition investigation and optimization, the adsorption capacity ( Q ) and the separation degree ( R ) in the equimolar concentration mixture solutions of NH 4 ReO 4 and KMnO 4 were adopted as indexes, and the obtained optimal conditions were as follows: the molar ratios of NMBA, NH 4 ReO 4 , AA, H 2 O 2 , and Vc to AM were 5.73, 0.052, 1.29, 0.02, and 0.003, and the temperature and time of polymerization were 40 °C and 28 h, respectively. Under optimal conditions, the sample with indexes, Q and R of 0.064 mmol/g and 3.20, were harvested. What is more, a further reusability study found that good adsorption selectivity was maintained after repeating the experiment 9 times. Taking the non-IP prepared under the same conditions as a control, Fourier transform infrared spectroscopy, transmission electron microscopy, and Brunauer Emmett Teller were used to characterize the structure of the ReO 4 – -IIP prepared under the optimal conditions. Finally, the kinetic study results showed that the zero-order kinetic model could better describe the adsorption process. The thermodynamic study results showed that the Langmuir model was more suitable for describing the isotherm adsorption process of the IIP.

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Section: Introductionmentioning

confidence: 99%

Study on Synthesis and Adsorption Properties of ReO₄^– Ion-Imprinted Polymer

Liu

Jia

et al. 2020

ACS Omega

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“…However, in that study, a phase modifier was also required. More recent studies using ILs as diluents used around 1% (w/w) of amine extractant (triisooctylamine) to obtain over 99% extraction of this metal ion from acid solutions 4,20 . In this work, only 3% (v/v) of [TOMA][BA] allows the extraction of around 95% of Re(VII) using an organic‐solvent‐free extracting solution without any phase modifier.…”

Section: Resultsmentioning

confidence: 99%

“…More recent studies using ILs as diluents used around 1% (w/w) of amine extractant (triisooctylamine) to obtain over 99% extraction of this metal ion from acid solutions. 4,20 In this work, only 3% (v/v) of [TOMA][BA] allows the extraction of around 95% of Re(VII) using an organic-solvent-free extracting solution without any phase modifier. On the other hand, it has been also demonstrated that the use of ILs as diluents enhances the extraction percentages.…”

Section: Process Parameters Effect Of the Initial Phmentioning

confidence: 99%

“…16 Overall, this work proposes an extraction phase free of conventional organic substances. So far, only a few works have used ILs for Re(VII) extraction, 4,6,20,21 where they have been used only as diluents in combination with conventional extractants. However, to our knowledge, there are no previous works where the combination of two ILs are used for extracting Re(VII) from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

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Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Quijada‐Maldonado

Román

Merlet

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Rhenium(Re) is a highly valuable metal recovered from molybdenite leach liquors by solvent extraction (SX) using toxic organic solvents. This work proposes an extracting phase free of volatile organics composed by the ionic liquid (IL) trioctylmethylammonium benzoate [TOMA][BA] as the extractant, due to its ability to extract Re(VII), and the IL 1‐octyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide [omim][Tf2N] as the diluent, due to its high hydrophobicity where the extraction stoichiometry and process parameters such as the initial pH, the extractant concentration in the diluent and stripping using ammonium hydroxide (boldNH4boldOH) and sodium hydroxide (boldNaOH) were assessed. RESULTS This extracting phase yielded high extraction percentages: 95% with only 3% (v/v) of [TOMA][BA] in [omim][Tf2N]. A detailed study of the SX stoichiometry was carried out through slope analysis, showing that the SX occurs in two steps: first, the extraction of acid; then, the extraction of the metal ion via anion exchange with the transfer of IL‐diluent anion to the aqueous phase. Additionally, the extracting phase was tested in a synthetic molybdenite leached pregnant leach solution, showing selectivity towards Re(VII) over Cu(II) and Fe(III) at very low extractant concentration. The stripping of Re(VII) from the loaded phase was also studied achieving 60% stripping in only one equilibrium step when using boldNH4boldOH. CONCLUSION This novel extracting phase, free of volatile organic, shows promising Re(VII) extraction for future industrial applications. © 2021 Society of Chemical Industry (SCI).

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“…Many methods, such as capillary electrophoresis, chemical deposition, liquid chromatography, ion exchange, and solvent extraction, are used to separate and enrich rhenium. Solvent extraction provides an effective and simple separation method; it is often used for the recovery of rhenium from molybdenum. − …”

Section: Introductionmentioning

confidence: 99%

Solvent Extraction of Rhenium in Ionic Liquid with N235

et al. 2017

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Extraction of rhenium into the ionic liquids phase from aqueous solutions was investigated using N235 as extractant. At temperatures from 293.15 to 318.15 K, the equilibrium molalities of ReO4 – were measured at an ionic strength from 0.2 to 2.0 mol·kg–1 in the aqueous phase containing NH4Cl as supporting electrolyte. The standard extraction constants K 0 at various temperatures were obtained by methods of the Pitzer polynomial approximation. Thermodynamic properties for the extraction process were calculated.

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Solvent Extraction of Rhenium(VII) from Aqueous Solution Assisted by Hydrophobic Ionic Liquid

Cited by 15 publications

References 18 publications

Study on Synthesis and Adsorption Properties of ReO₄^– Ion-Imprinted Polymer

Study on Synthesis and Adsorption Properties of ReO₄^– Ion-Imprinted Polymer

Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Solvent Extraction of Rhenium in Ionic Liquid with N235

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Solvent Extraction of Rhenium(VII) from Aqueous Solution Assisted by Hydrophobic Ionic Liquid

Cited by 15 publications

References 18 publications

Study on Synthesis and Adsorption Properties of ReO4– Ion-Imprinted Polymer

Study on Synthesis and Adsorption Properties of ReO4– Ion-Imprinted Polymer

Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Solvent Extraction of Rhenium in Ionic Liquid with N235

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Product

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Study on Synthesis and Adsorption Properties of ReO₄^– Ion-Imprinted Polymer

Study on Synthesis and Adsorption Properties of ReO₄^– Ion-Imprinted Polymer